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RDMA/uverbs: Check ODP in ib_check_mr_access() as well

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No reason only one caller checks this. This properly blocks ODP
from the rereg flow if the device does not support ODP.

Link: https://lore.kernel.org/r/20201130075839.278575-3-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe 2020-11-30 09:58:36 +02:00
parent b9653b31d7
commit adac4cb3c1
4 changed files with 12 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/infiniband/core/uverbs_cmd.c
View File

@ -709,29 +709,20 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
return -EINVAL;
ret = ib_check_mr_access(cmd.access_flags);
if (ret)
return ret;
uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
if (IS_ERR(uobj))
return PTR_ERR(uobj);
ret = ib_check_mr_access(ib_dev, cmd.access_flags);
if (ret)
goto err_free;
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
if (!pd) {
ret = -EINVAL;
goto err_free;
}
if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
if (!(pd->device->attrs.device_cap_flags &
IB_DEVICE_ON_DEMAND_PAGING)) {
pr_debug("ODP support not available\n");
ret = -EINVAL;
goto err_put;
}
}
mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
cmd.access_flags,
&attrs->driver_udata);
@ -805,7 +796,7 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
}
if (cmd.flags & IB_MR_REREG_ACCESS) {
ret = ib_check_mr_access(cmd.access_flags);
ret = ib_check_mr_access(mr->device, cmd.access_flags);
if (ret)
goto put_uobjs;
}

2
drivers/infiniband/core/uverbs_std_types_mr.c
View File

@ -115,7 +115,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(
if (!(attr.access_flags & IB_ZERO_BASED))
return -EINVAL;
ret = ib_check_mr_access(attr.access_flags);
ret = ib_check_mr_access(ib_dev, attr.access_flags);
if (ret)
return ret;

2
drivers/infiniband/hw/mlx5/devx.c
View File

@ -2068,7 +2068,7 @@ static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
if (err)
return err;
err = ib_check_mr_access(access);
err = ib_check_mr_access(&dev->ib_dev, access);
if (err)
return err;

6
include/rdma/ib_verbs.h
View File

@ -4183,7 +4183,8 @@ struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device,
struct inode *inode, struct ib_udata *udata);
int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata);
static inline int ib_check_mr_access(int flags)
static inline int ib_check_mr_access(struct ib_device *ib_dev,
unsigned int flags)
{
/*
* Local write permission is required if remote write or
@ -4196,6 +4197,9 @@ static inline int ib_check_mr_access(int flags)
if (flags & ~IB_ACCESS_SUPPORTED)
return -EINVAL;
if (flags & IB_ACCESS_ON_DEMAND &&
!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
return -EINVAL;
return 0;
}